TY  - JOUR
T1  - Influence of the Number of Antennas on the Outage Probability of
Non-Orthogonal Multiple Access in 5G Systems
AU - Alsabbagh, Haider M. 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 19
SP  - 8051
EP  - 8056
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.8051.8056
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.8051.8056
KW  - 5G
KW  -non-orthogonal multiple access
KW  -outage probability
KW  -MIMO
KW  -antennas
KW  -next generation
AB  - The 5G wireless system relies on Non-Orthogonal Multiple Access (NOMA) as a radio access scheme using extremely-dense base stations and unprecedented number of antennas to provide improved performance, high degree of integrative services, high-rate coverage and seamless user experience. The difference in the number of antennas used in the Mobile Devices (MDs) and those in the Base-Stations (BSs) in a cell plays a significant role in the overall system performance. Evaluation of the influence of such difference (&delta;) is analyzed in this study based on the outage probability, Pr<sub>k</sub><sup>out</sup>. Computer simulation results are provided to facilitate the performance evaluation of the MIMO-NOMA and also, to demonstrate the accuracy of the developed analytical results. The achieved results reveal that a trade-off between the level of the SNR and the &delta; in the outage probability. Also, strategy of pairing users in a cluster plays an important role in the value of Pr<sub>k</sub><sup>out</sup> when the number of users in a cluster is increased more than two users the performance is governed by allocation of the transmit power coefficient with level of SNR besides &delta;, compared with that of the conventional orthogonal Multiple Access (OMA).
ER  -